The receive panel contains the main window for receiving pictures. The picture canvas size is 320 x 256 by default. The canvas adapts itself automatically depending on the mode ( robot, martin,P3,..) of the received image. This panel also contains a spectrum display and a scope allowing you to view the SSTV signals for tuning purposes.
Key-binding: Alt+F
Saves the file you have in the main receive window to the default receive directory.
Key-binding: Ctrl+S
This will bring up the Print Destination panel and let you print the image displayed in the main receive window.
Key-binding: Ctrl+P
Shutdown the QSSTV program.
Key-binding: Ctrl+Q
Key-binding: Alt+O
This lets you setup the QSSTV default startup settings. The settings are written to the qsstv.conf file located in the home directory.
Key-binding: Ctrl+C
This opens the slant adjust panel with slider controls that are used to adjust the video sample clock frequency to correct for some inaccurate soundcard crystals. For example. If the image slants to the left (top to bottom) then moving the slider`Right will adjust the clock frequency so that the slant moves to the right. Note: this will change both the rx clock and the tx clock.
Key-binding: Ctrl+L
Key-binding: Alt+H
Access to this file.
Key-binding: Ctrl+C
QSSTV Author and version information.
Key-binding: Ctrl+A
Troll Qt GUI toolkit information.
Key-binding: Ctrl+H
The default values on start-up are defined in the Configuration window
Note: There is a limit on the memory size. The zoomfactor will be limited accordingly. This can happen with large FAX images.
Use this combobox to select SSTV or FAX mode.
This is the receive audio volume indicator. A good setting for this would be 50 to 70 percent
Select the main filters.(equivalent to input bandpass filter centered around 1750 Hz)
This filter is applied on the demodulated data (i.e. a noise filter).
Note: You can change both filtersettings on the fly and directly observe the effect.
if you select this button, image reception will start after detecting the VIS code. This code is sent at the beginning of an image to indicate which sstv mode is to be used and then switch to that mode without user intervention. The program will automatically select the mode when this button is unchecked. It will use a special algorithm to select the correct mode, based on the linetiming of the image. The mode name will be displayed at the bottom right corner of the receive window.
Note: Using the automatic reception is the prefered method.
When this button is selected, images will automatically be saved to the default Rx image folder without user intervention
This function will disable the automatic resync to top of image when receiving noisy signals. (hince the name DX)
This combobox lets you select low,medium or high sensitivity for the sync detection. Select high for noisy conditions and low for strong signals. When you select high, then false triggering can occur. If this happens, click the start or resync button again.
This will erase the old image before receiving a new one.
When selected, received images will be retransmitted. See also the configuration window.
Shows the spectrum of the received signal You can use this to tune your receiver to the correct frequency. Align the lower (1200 Hz) peak with the vertical red line. You also have markers every 100 Hz from 1500 to 2300 Hz
The scope on the right gives you a picture of the synchronization pulse. The raising edge should stay correctly aligned with the red marker. This is also a good indicator for the receive quality. The view of the sync pulse will be distorted if you use narrow postfilters.